Preparation

Place radicchio on large rimmed baking sheet. Whisk balsamic vinegar and 1/4 cup olive oil in small bowl. Season with salt and pepper. Pour all but 1/4 cup marinade over radicchio, turning to coat. Let stand 3 hours.

Recent Review

I don''t understand why other reviewers said this was expensive to make. What was so expensive? The truffle oil? All of theother ingredients are fairly reasonably priced and I grow all of the herbs on my front porch.
The bitterness of the raddichio should be tempered by the sweetness of the balsamic vingegar and by cooking it. Grilling is a good alternative.
Since I usually only cook for two, I used one hen and split it. My grocer sells quail, too, so i might try it that way next time.